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Vulnerabilities CVE-2021-47055

CVE-2021-47055

High
Open
TLP:CLEAR

mtd: require write permissions for locking and badblock ioctls

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Description

In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.

Details

CVSS Score
7.1
EPSS Score
0.20%

9.6th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Confidence
90%
Published
Feb 29, 2024
Last Modified
Aug 5, 2026
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